It was found that when doing handshake/renegotiation, it's possible to bypass DTLS replay protection by sending a record for the next epoch (which does not have to decrypt or have a valid MAC), with a very large sequence number. This means the right hand edge of the window is moved very far to the right, and all subsequent legitimate packets are dropped causing a denial of service. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2181
